Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/140482
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Type: | Journal article |
Title: | Enhanced Photocatalytic and Photovoltaic Performance Arising from Unconventionally Low Donor-Y6 Ratios |
Author: | Dolan, A. Pan, X. Griffith, M.J. Sharma, A. de la Perrelle, J.M. Baran, D. Metha, G.F. Huang, D.M. Kee, T.W. Andersson, M.R. |
Citation: | Advanced Materials, 2024; 36(15):2309672-1-2309672-17 |
Publisher: | Wiley |
Issue Date: | 2024 |
ISSN: | 0935-9648 0935-9648 |
Statement of Responsibility: | Andrew Dolan, Xun Pan, Matthew J. Griffith, Anirudh Sharma, Jessica M. de la Perrelle, Derya Baran, Gregory F. Metha, David M. Huang, Tak W. Kee, and Mats R. Andersson |
Abstract: | Development of both organic photovoltaics (OPVs) and organic photocatalysts has focused on utilizing the bulk heterojunction (BHJ). The BHJ promotes charge separation and enhances the carrier lifetime, but may give rise to increased charge traps, hindering performance. Here, high photocatalytic and photovoltaic performance is displayed by electron donor-acceptor (D-A) nanoparticles (NPs) and films, using the non-fullerene acceptor Y6 and polymer donor PIDT-T8BT. In contrast to conventional D-A systems, the charge generation in PIDT-T8BT:Y6 NPs is mainly driven by Y6, allowing a high performance even at a low D:A mass ratio of 1:50. The high performance at the low mass ratio is attributed to the amorphous behaviour of PIDT-T8BT. Low ratios have generally been thought to yield lower efficiency than the more conventional ∼1:1 ratio. However, the OPVs exhibit peak performance at a D:A ratio of 1:5. Similarly the NPs used for photocatalytic hydrogen evolution show peak performance at the 1:6.7 D:A ratio. Interestingly, for the PIDT-T8BT:Y6 system, as the polymer proportion increases, we observe a reduced photocatalytic and photovoltaic performance. The unconventional D:A ratios provide lower recombination losses and increased charge-carrier lifetime with undisrupted ambipolar charge transport in bulk Y6, enabling better performance than conventional ratios. This work reports novel light-harvesting materials in which performance is reduced due to unfavourable morphology as D:A ratios move towards conventional ratios of 1:1.2-1:1. This article is protected by copyright. All rights reserved. |
Keywords: | Homojunction OPVs Low-donor Content Organic Semiconductors Photocatalysis Photovoltaics Quantum Mechanics Renewable Energy |
Description: | OnlinePubl |
Rights: | © 2024 The Authors. Advanced Materials published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
DOI: | 10.1002/adma.202309672 |
Grant ID: | http://purl.org/au-research/grants/arc/DP160103797 http://purl.org/au-research/grants/arc/DP220102900 http://purl.org/au-research/grants/arc/LE0989747 http://purl.org/au-research/grants/arc/LE200100051 http://purl.org/au-research/grants/arc/DP230102705 http://purl.org/au-research/grants/arc/FT230100154 |
Published version: | http://dx.doi.org/10.1002/adma.202309672 |
Appears in Collections: | Research Outputs |
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File | Description | Size | Format | |
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hdl_140482.pdf | Published version | 3.94 MB | Adobe PDF | View/Open |
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